Upgrade your Ar with Daniel Defense's Modular Float Rail or MFR Handguard! It comes outfitted with M-LOK attachment point for the installation of tactical lights/lasers and fore-grips, as well as a flattop picatinny rail for use with optics. The MFR also includes sling swivel attachment points on both sides for ambidextrous use, and a sleek bolt-up system provides enhanced strength and a reduced overall diameter to make the rifle easier to control. Features of the Modular Float Rail: Light Weight Free Floating Barrel DesignUninterrupted Mil-Spec 1913 Picatinny Upper RailM-Lok attachment at 7 different positionsConfigurable Sling Swivel Attachment PointsPatented Bolt-Up Mounting SystemGrade 8 Military Specification Fasteners Daniel Defense 15" Modular Float Rail M-LOK Handguard 01-107-16044